package builtin

import (
	"context"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"github.com/dop251/goja"
)

type TestArgs struct {
	Field1 string `json:"field1"`
}

func (t TestArgs) Validate() error {
	return nil
}

func TestAsyncBuiltin(t *testing.T) {
	RegisterAsyncBuiltin[TestArgs, string]("testAsync", func(_ context.Context, args TestArgs) (string, error) {
		return "result: " + args.Field1, nil
	})

	registryMutex.RLock()
	builtin, ok := builtinRegistry["testAsync"]
	registryMutex.RUnlock()

	require.True(t, ok, "testAsync should be registered")
	assert.Contains(t, builtin.Definition, "Promise<string>", "definition should include Promise<string>")
}

func TestAsyncBuiltinResolution(t *testing.T) {
	RegisterAsyncBuiltin[TestArgs, string]("resolveTest", func(_ context.Context, args TestArgs) (string, error) {
		return "test-result", nil
	})

	vm := goja.New()
	RegisterBuiltins(vm)

	result, err := vm.RunString(`resolveTest({field1: "hello"})`)
	require.NoError(t, err)

	promise, ok := result.Export().(*goja.Promise)
	require.True(t, ok, "should return a Promise")
	assert.NotNil(t, promise)
}

func TestAsyncBuiltinRejection(t *testing.T) {
	RegisterAsyncBuiltin[TestArgs, string]("rejectTest", func(_ context.Context, args TestArgs) (string, error) {
		return "", assert.AnError
	})

	vm := goja.New()
	RegisterBuiltins(vm)

	result, err := vm.RunString(`rejectTest({field1: "hello"})`)
	require.NoError(t, err)

	promise, ok := result.Export().(*goja.Promise)
	require.True(t, ok, "should return a Promise")
	assert.NotNil(t, promise)
}

func TestNonPromise(t *testing.T) {
	RegisterBuiltin[TestArgs, string]("nonPromiseTest", func(_ context.Context, args TestArgs) (string, error) {
		return "sync-result", nil
	})

	vm := goja.New()
	RegisterBuiltins(vm)

	result, err := vm.RunString(`nonPromiseTest({field1: "hello"})`)
	require.NoError(t, err)
	assert.Equal(t, "sync-result", result.Export())
}